Diff of /CMakeLists.txt [e05a48] .. [dd7c73] Maximize Restore

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--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,3 +1,7 @@
+
+# require at least cmake 2.4
+cmake_minimum_required(VERSION 2.4)
+
 set(CMAKE_MODULE_PATH ${CMAKE_SOURCE_DIR}/CMakeModules )
 
 include(HuginMacros)